Container and container manufcture



Aug SM.

A. Hf LocKwooD 'CONTAINER AND CONTAINER MANUFACTURE Filed May 13, 1939AIhErfHLnEKLuund Patenteci Aug. 5, 1941 CONTAINER AND CONTAINERMANUEACTURE i Albert Il. Lockwood, Monroe, Mich., assigner toConsolidated Paper Company, Monroe, Mich., a corporation of' MichiganApplication May 13, 1939, Serial No. 273,383

(Cl. 22S- 39) 1 Claim.

This. invention relates to packaging, especially of flowable material.

This invention has utility when incorporated in sheet stock packaging,assembly into receptacle form, charging of said receptacle, and sealingthe receptacle as a holder for said charge.

Referring to the drawing:

Fig. 1 is a distributed plan view of sheet stock in blank-out form cutand scored for folding into a container;

Fig. 2 is a side View on an enlarged scale o-f the completed, closed andsealed container as formed from the blank of Fig. l;

Fig. 3Y is a section on the line III-III, Fig. 2, showing the holdingform for receiving .the container or carton, the contents being absent;

Fig. 4 is a plan view of the container top with the inner minor ornot-meeting flaps folded in- Ward and one of the major flaps foldedthereover, leaving but the one major flap and its supplemental orsecondary flap therewith;

Fig. 5 is a fragmentary view from the line V-V, Fig. 4, showing theapplication of adhesive to the major flap as carrying the supplementalflap and the .two major flaps in partially open position ready to havethe terminus of the simple major flap inserted upon the other flapadjacent the supplemental flap portion;

Fig. 6 is a plan View of the container end or top as in closed position;and

Fig. '7 is a section on the line VII-VII, Fig. 6, showing theinteritting assembly of the flaps as sealing the container.

Sheet stock may have a carton form comprising side walls I, 2, 3, 4.Extension 5 may overlap the edge of the side Wall I and be connectedthereto with staples 6 (Fig. 2). The side 4 has end or bottomextension 1. The side 3 has extension 8 adapted to be assembled withflap 'I by staples 9. From the side I minor flap I0 is similar in extentaway from the side I as the minor flap 8. This flap I0 is anchored uponthe minor flap 8 and the major flap 1 by anvil stitching or clinchedstaples II. From the minor side 2 there is minor flap extension I2similar to the extension I and opposite thereto. This extension I2 inthe set-up is connected by -attaching means which may even be in thisoverlapping portion supplemented by adhesive or solely by adhesive, butis herein shown as reinforced by anvil stitching or clinched-staples I3.There is thus produced minor flaps on threesides of the end or bottomwhich has major single ply portion 1.

Opposite terminus remote from this closed sealed bottom comprises majorsimilar flap portions I4, I5, from the respective sides 4, 3, andintermediate minor similar length flap portions I6, I1, from therespective sides 2,. I. In the tubular set-up of the container, thesefour flap portions remote from the closed end 1 may protrude beyond formI8 in which the container may be inserted for charging.

Before this insertion, or even before blanking in the handling of somestocks, it may be in order to apply thereto a surface treatment orcoating I9. This might be a stain resistant or waterproofing material.In practice, especial value is found in a coating sufficiently adherentto be retained with the carton as formed, but which in the instance thecharge be of plastic body especially with adherent or sticky tendencies,Such may, in satisfying the adherence of the contents, isolate suchcontents from the container. Experience hereunder yalong such line is inpackaging bituminousV material ofviscous or similar plastic andcompounds thereof, say with fiber, asbestos, body forming materials. Inthe instance Wherein asphalt is hot poured or without loading or othermaterial therewith, this coating I9 may efficiently protect thecontainer walls therefrom as to stain or attack, while in the instanceof removal of the container it may be readily severed from the contents.In this charging of the container, say with flowable material, there istendency to bulge or spread the sidewalls, especially in a materialwhich may be of a higher temperature at the filling or pouring and whichhas a solidifying or less flow rate after charging. To this end, theform I8 may prevent this bulging or deformation of the container at thecharging.

The flaps I6, I1, may be folded inward and the flap I5 folded thereon.Glue 2l] may be on the flaps I5, Il, I5, and the under Side of the ilapI4.

In the efficient carrying out of the invention herein, the flap l, whichis of approximately full bottom extent for the container is an extensionof the side 4 beyond that of the extent of the minor flaps Ill, 8, I2,from the respective sides I, 3, 2. This leaves a reentrant portion. 2Ifrom which may be cut out small similar portions 22 and somewhat largerportions 23, leaving a major extent portion 24 having score portions toleave similar terminal flaps 25. This portion 24 is mounted on the flapI4 by anvil stitching or clinched staples 26 in such spacing from theside 4 as to clear the portion 5 as the flap I4 is folded toward theflap I5. The attaching means or row of staples 26 is suiciently spacedfrom the longer free side of this flap I4 as to spread therefrom toleave V-opening 21, in which further adhesive 2i! may be introduced bybrush 28. There is thus provided since the portion l5 has its free end29 thrust in this V-opening 21 an interlock relation for thissupplemental iiap portion 24 to adhere in parallelism as 'an additionalply portion over the flap l5.

In view of the mass as loaded into the package, emcient holding may beeffected even beyond that of adhering material or glue. In the instancethe charge be Vat a temperature, say of molten bituminous matter orasphalt, the reaction from this temperature may be not only upon thecoating IS to insure isolation from the container body proper but may asWell be a further reaction With the glue in xing and accelerating suchas an efficient adhesive. The aps 25 may be brought into position withstaples 30. These flaps 25 may be especially designed or colored forcontents or partial identication beyond that of printed marking. Theeectiveness of this container holding as against handling, even of heavycharges say up to 50 pounds or more, is insured due to the enicientholding even by stapling alone, although there may be the additionalefliciency as against seepage or sifting out of fine granular or flowtype of material in the event of handling thereof.

In the practice hereunder, when the contents to be handled be suchmaterial as hot asphalt at the time of packaging, there may be this'coating I9 and the supplemental anchoring by staples 9, Ii, 3,V 25.However, the final closing may omit further stapling 35 and haveadhesive solely on the portion or section 24 and its aps 25.Accordingly, at the closed down position (Fig. '7) these flaps 25 maythen be thrust down into the container or form I8 (Fig. 3) with thepressure of the contents thrusting the walls l, 2, thereagainst and theform holding against bulging.

This adhesive sealing should be suicient. However, on package removal,should such not be acceptable the additional staples 35 may then beadded. By omitting the adhesive or limiting the adhesive solely to thisportion 24 and its flaps 25, there may be more ready opening up of thecontainer for access to the contents.

The closure herein has particular advantage wherein Water-proofed stockis used. In the use of a Water-proong composition having a paraffin androsin base, the heat of the contents so reduces the viscosity of theWater-proof coating that such is absorbed into the stock, therebyproviding an outer surface susceptible of adherence with the use of anadhesive. An eiective adhesion of the intertting parts is complete underthe invention herein Within a space of ten to fifteen minutes.

What is claimed and it is desired to secure by United States LettersPatent is:

A'closure for a package embodying a pair of opposing flaps foldable inoperative position to face contacting relation substantially in a commonplane with free edges adjacent, a flap eXtension on a rst of the iiaps,said extension having one end anchored to the outer side of the firstflap rearwardly of the free edge thereof and having its other endprojecting toward the second flap and beyond the free edge of the istflap to provide with said first iiap a V -Way forreceiving the free edgeof the second flap, the free edge of the second flap, when positioned insaid V-vvay, overlapping the free edge of the first ilap, and the flapextension overlying and overlapping the free edges of both the first andsecond fla-ps, said flap extension having supplemental flap portionssecured to each end thereof Which in their operative position aresecured to the adjacent sides of the package. y

ALBERT H. LOCKWOOD.

